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/* $Id$ */

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/** @file tunnelbridge.h Header file for things common for tunnels and bridges */

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#ifndef TUNNELBRIDGE_H

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#define TUNNELBRIDGE_H

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#include "tile_type.h"

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#include "map_func.h"

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#include "tunnelbridge_map.h"

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/**

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 * Calculates the length of a tunnel or a bridge (without end tiles)

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 * @return length of bridge/tunnel middle

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 */

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static inline uint GetTunnelBridgeLength(TileIndex begin, TileIndex end)

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{

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	int x1 = TileX(begin);

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	int y1 = TileY(begin);

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	int x2 = TileX(end);

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	int y2 = TileY(end);

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	return abs(x2 + y2 - x1 - y1) - 1;

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}

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#endif /* TUNNELBRIDGE_H */